if hiding the comments' scores will increase the quality of the discussions, hiding the points in submitted stories will do the same thing (at least increasing the quality of stories).
if you don't agree, then I think we can put back the comments scores?
Comments, and the links they comment on, are different things, so we should not be surprised if the best solutions for ranking them are different.
There is already precedent for treating them differently --- it is possible to downvote a comment, but impossible to downvote a link.